Comment 0 for bug 108527

i just installed the new ubuntu 7.4 on my laptop toshiba m40x with ati x300.
i've enabled desktop effects with no window wobbling and with cube rotation.
it works quite well but sometime, without any clear reason, the desktop freezes completely (happened simply moving the mouse on an icon or opening a new application):
the mouse moves but can't interact with the desktop
no chance to ctrl-alt-bksp, or to change console (ctrl-alt-f1), keyboard is not responding
i have to shout down the computer from the power button. (restarting everything works again but occasionally some new bugs appear)
Don't know how to give more informations.

there are a number of other minor but annoying bugs correlated, i don't know if they have to be posted here or in the compiz bugsite.
they happen quite frequently and are:
after maximizing a window it is not possible to unmaximize from the title bar icon (only from the bottom panel)
the number of workspaces resets to 1 and the cube is not able to rotate
some windows are not refreshed and the content is not visible (as bug 91810)
some windows are visible in every workspace
and more..